Answer:
this is a no solution problem, nothing could sub for x and make this true
There is no solution for the first one
if you eliminate y you get 2 equations
-13x - 13z = -25
-13x - 13x = -15
- there is no solution to theses
a23 means the element in the second row and the 3rd column
so its -5
![\Large\boxed{\tt Answer:~x=\frac{5}{7} }](https://tex.z-dn.net/?f=%5CLarge%5Cboxed%7B%5Ctt%20Answer%3A~x%3D%5Cfrac%7B5%7D%7B7%7D%20%7D)
![\tt Step-by-step~explanation:](https://tex.z-dn.net/?f=%5Ctt%20Step-by-step~explanation%3A)
Remember: PEMDAS - Parentheses, exponents, multiply/divide, add/subtract
Distribute: 9(1+x) = 9+9x
19 - 5x = 9 + 9x
Add 5x to both sides of the equation and subtract 9 from both sides.
19 - 5x + (5x) = 9 + 9x + (5x)
19 - (9) = 9 - (9) + 14x
10 = 14x
Divide both sides by 14 to get the variable on its own.
10/14 = 14x/14
10/14=x
5/7 = x
Answer:
An isosceles right triangle has 2 congruent sides.
Answer:
22 grams
Step-by-step explanation:
loses 50% of it's mass per 22 years
so after 22 years the mass would be 44 grams
22 years later would leave 50% of 44 grams = 22 grams